龙滩水电站进水口高边坡排水系统设计

龙滩水电站进水口边坡最大坡高达420m，为解决边坡稳定问题，进行了长期的设计研究和科技攻关，取得了大量的研究成果和设计经验，确定了合理的开挖体形，选择了恰当的加固支护措施，布设了系统排水网络。排水系统由地表排水系统和山体排水系统组成，地表排水设纵横戴水沟，山体排水系统由8层排水主洞及支洞组成，洞内布设排水孔，构成整个高边立体排水网。

Design of High Side Slope Drainage System at the Intake of Longtan Hydropower Station

As the maximum height of side slope at the intake of the underground powerhouse of Longtan hydropower station is as much as 420 m,a long term of design studies are made in order to solve the problem of slope stability.Based on the large amount of study results and design experiences,a rational excavation form and reinforcing measures are defined,and a three dimensional drainage network,which is composed of ground drainage system and underground drainage system,is set up.Ground drainage system is made up of crisscross catchwater and the underground system is made up of 8 layers of clued leading drainage tunnels together with embranchment,as well as drainage holes inside the tunnels.